Suction cup base



FIG. 1 is a perspective view of a suction cup base, showing my new design;

FIG. 2 is a left-side elevational view thereof, the right-side elevational view being a mirror image thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevational view thereof; and,

FIG. 6 is a rear elevational view thereof. 

I claim the ornamental design for a suction cup base, as shown and described. 